The clinical evaluation of root canal preparations by ProTaper Nikel-Titanium rotary files in primary teeth.

Objective:Clinical compared the root canal preparation in primary teeth between ProTaper Nikel-Titanium rotary files and stainless steel hand files. Method:forty-two children(fifty primary mandibular first molars)requiring root canal therapy were included in this study.The teeth were randomly divided into two groups. group A:root canals were prepared by ProTaper NiTi rotary flies. group B:root canals were prepared by stainless steel hand files.thier effinciency were campared in preparation time and the quality of root canal filling radiographically with Matapex.Result:the time of preparation in A group was shorter than in Bgroup,which was significant (p 0.01).according to the quality of the toot canal filling radiographically,optimally filled mesial root canals of primary mandibular first molars was statistically significant between the 2 groups(p 0.01),optimally filled distobuccal and distolingual root canals was not statistically significant(p 0.05). conclusion:It's encouraging to use the protaper NiTi rotary files and Metapex in root canal therapy of primary teeth.